Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7993522 | Conditioning system for activated sludge wastewater treatment processes | Thomas Kutcher, Marc E. Roehl | 2011-08-09 |
| 7569147 | Screening of inert solids from a low-yield wastewater treatment process | Marc E. Roehl, Michael L. Doyle, Peter J. Petit | 2009-08-04 |
| 7186332 | Orbital wastewater treatment system with combined surface aerator and submerged impeller | Frederick M. Riser, John Vorwaller | 2007-03-06 |